Singletree or doubletree.



No. 7|2,9|6. l Patented Nay. 4,-|902. J. M. DUNLAP &. J. W. TRACY. SINGLE-TREE 0B DOUBLETREE. (u M d I) (Application med July 29, 1902.)

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JOHI\T M. DUNLAP AND JAMES IV. TRACY, OF VICKSBURG, KENTUCKY;

SAID TRACY ASSIGNCR TOSAID DUNLAP.

SINGLETREE on DQUBLETREE.

SPECIFICATIO forming part of Letters IPatent No. '712,9 dated November 4, 1902.

' Application tiled July 29, 1902. Serial No. 117,497. (No model.)

To all 11172/0711, it may concern: Be it knownthat We, JOHN IWI. DUNLAB and JAMES W. TRACY, citizens of the United States, residing at Vicksburg, in the countyv of Livingston and State of Kent ucky, have -i nvented certain new and useful Improvements in Singletrees or Doubletrees, of which the following is a specification.

This invention relates to singletrees and doubletrees; and the points ot' novelty consist in the construction lof the, several parts and in their combination as awhole', here-2 by a stronger and more economical construe-1 tion will result, more fully hereinafter described in detail.'

In the drawings, Figure lis atop plan view of a doubletree and singletrees embodying the features of the invefltion. similar view showing a slight modification in the construction and arrangement of the parts. Fig. 3 is a top plan view of a doubletree, showing singletrees thereon and also embodying a further modification in construction and arrangement. Fig. 4 is a top plan view of either-Ja doubletree or singletree embodying a modification in the construction thereof.

Similarnumerals of reference are employed to indicate corresponding parts in the several views. v

Referring particularly to Fig. l, the numeral l designates adoubletree, and 2 singletrees. To the back edge of the doubletree and each singletree a rod 3 is normally held and is bent to conform to therrear edge con-V ThisI bar 3 is held in;l

tour of such devices. engagement With either the doubletree or singletrees by eyebolts 4, arranged on opposite sides of the center and at the ends-thereof. The doubletree and singletrees are formed, as usual, of Wood and provided with end wear sleeves or caps 5, and the rods 3- are terminally extended over the outer ends of the said caps or sleeves inlplanes at right angles to form forwardly-projecting hook members 6, said members beingextended in advance'of the frontedges ofthe doubletree and singletrees and rebent to provide rear- .Wardly-projecting hook members '7, parallel to the hook members 6, and to form forward bearing-bends 8. The terminals of the memvthus results.

Fig. 2 is al bers 7 are projected rearwardly beyond the Vjzment portion of the rod 3 and spaced apart from the latter a suitable distance to serve as an entrance-throat for the attachmentof draft devices or the application of singletrees to doubletrees, as clearly shown by Fig. l. The guards 9 of the several hooks prevent the devices in engagement with the latter from becoming accidentally detached `when moved rearwardly, and a reliable connection Each rod 3 has atits center between the eyebolts 4 on opposite sides of the center of the doubletree and of each singletree an eye l0, which is formed by doubling and twisting the said rods, the eye l0 being in a substantially horizontal plane for secure- :ment to the rear extremity of aWagon-tongue `or analogous device, and the eyes l0 of the singletrees are in planes at right angles to the upper and lowersides of the said singletrees for convenience in assemblage of the singletrees in connection with the hooks of the doubletree and to dispose the said singletrees in proper positions.

The form of the device shown by Fig. 2, as far as the singletrees are concerned, presents va structure similar to that just described; but

the rod 11, secured to the rear edge of the doubletree, is in this instance straight and is not formed with the central loop or eye 10, heretofore described. In other respects the Vstructure disclosed by Fig. 2 is the same as that shown by Fig. l and bears the same reference-numerals.

In the a1rangement shown by Fig. 3 the doubletree 12 has a back orreinforce iron 13, and the singletrees 14 are pivotally mounted on the said doubletree and have rods 15 Without the central loops, but formed with the hooks similar to those shown by Figs. l and 2. In Fig. Lt a detail of either a singletree or doubletree 16 is illustrated. The rod 17, secured to the back of this device, is4 without the loop or eye at .the center, but has the end hooks 18 in all respects similar in formation to the hooks heretoforedescribed.

' The improved device Will be found exceptionally strong and durable in either of its IOO forms and economical in the cost of manu* facture b v reason of the absence of the individual hooks or holding devices usually employed in connection with the opposite ends' of doubletrees and singletrees. The pulling strain on the hooks of eitheuthe doubletree or singletree is equally distributed over the back edge of such devices through the medium of the provision of the rods and the integral formation therewith of the terminal hooks for attaching purposes. In the form of doubletree and singletree having the loops or eyes at the center of the rods and which are formed before said rods are applied the expense and inconvenience arising from separately securing an eye or loop at the center of the back edge of a doubletree or singletree is overcome, and, moreover, when the rod bearing the hooks and eyes or loops, as well as the rods without the eyes or loops, is applied all the parts Which serve as attaching means are simultaneously secured in operative position, thus saving considerable time in preparing a doubletree or singletree for practical service. Moreover, by disposing the rods directly against the edges of the doubletree or singletrees a reinforcement is not only provided for the latter devices, but the rods themselves are strengthened and braced, especially in view of the intermediate eyebolts 4, disposed on opposite sides of the center of each doubletree or singletree and engaging the rods.

Changes in the form, proportions,and minor details maybe resorted to without depart-ing from the spirit of the invention.

Having thus fully described the invention, what is claimed as new is 1. The combination with a doubletree or a singletree, of a rod applied 'ro and securedin close relation to the rear edge thereof and formed with opposite horizontally-disposed terminal hooks at an angle thereto and which extend across the ends of the singletree or doubletree,the entrance-throats to said hooks being in rear of the ends ofthe singletree or doubletree.

2. The combination with a doubletree or a singletree, of a rod closely applied against and secured to the rearedge thereof and having horizontally-disposed angularly-projecting terminal hooks with entrance-throats in rear of the ends of the doubletree or singletree, and rear terminal guards extending inwardly in planes parallel with the said rods. In testimony whereof we affix our signatures in presence of two witnesses.

JOHN M. DUNLAP. JAMES W. TRACY. lVitnesses:

C. O. LoWERY, J. FORT ABELL. 

